{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Self (2015)}&\multicolumn{1}{c}{Caste Group (2015)}&\multicolumn{1}{c}{Self (2016)}&\multicolumn{1}{c}{Caste Group (2016)}\\
\hline
RD Estimate         &       37.40\sym{***}&       -0.65         &       34.24\sym{***}&       -0.65         \\
                    &      (4.46)         &      (1.08)         &      (4.93)         &      (1.08)         \\
\hline
Observations        &        1105         &        1103         &        1105         &        1103         \\
Clusters            &         757         &         755         &         757         &         755         \\
\hline\hline
\end{tabular}
}
